Locking device for friction-top cans



JOHN E. KEMLER.

ATTORNEY 4 Sheets-Sheet' 1 r 8. 9 H St: a B I. H .H h/. n 7 1 3 Sept. 8, 1925.

J. E. KEMLER LOCKI NG DEVICE FOR: FRICTION TOP CANS Filed se t. 22, 1923 Fig.

Se s, 1925.

J. E.- KEMLER LOCKING DEVICE FOR FRICTION TOP CANS Filed Sept. 22, 1923 4 Sheets-Sheet 2 JpHN E. KEMLER INVENT'OR y. 86M ATTORNEY Sept. 8, 1925.

4 Sheets-Sheet 3 F1106 Supt. 22, 1923 Fig. 7.

Joan E. KEMLER INVENTOR av ATToRNEY Sept. 8, 1925.

J. E. KEMLER LOCKING DEVICE FOR FRICTION TOP CANS and Sept. 22, 1923 4 Sheets-Sheet 4 JOHN EMEmER,

INVENTOR E Y AZ'ORNEY Patented Sept. 8, 1925,

UNITED STATES JOHN E. KEMLER, or BALTIMORE, MARYLAND.

LOCKING DEVICE FOR FRICTION -TOP CANS.

Application filed September 22, 1923. Serial No. 664,166.

To all whom it may concern:

Be it known that I, JOHN E. KEMLER, a citizen of the United States, residing in Baltimore, in the State of Maryland, have invented new and useful Improvements in Looking Devices for Friction-Top Cans, of which the following is a specification.

This invention relates to an apparatus for fastening or looking the heads into the ordinary friction top cans so that they will not be jarred out by the rough handling of the cans. Friction top cans are those having an opening at one end with a small fiat ring fastened to the upper inner edges of the sides of a can. This ring usually is reamed down a little so that a very short edge projects inward, approximately parallel with the sides of the can. The top is dish shaped, with edges nearly perpendicular to the body of the top, and with a bead turned outward around the upper part of the edges. The lid is forced into the opening in the top of the can, down to the bead, and the edges fit-tightly. The bead keeps the lid from goingall the way into the can. These cans are extensively used to pack oysters, vegetables, fruits, paints and many other things.

The cans are usually cylindrical, although other shapes are sometimes employed. It has been found, in the use of the larger cans especially, that the head would jar out when the can was subjected to rough treatment, as it usually is in transportation. To remedy this defect, small nails have been driven through the sides. of the can top or lid to hold it in, or solder has been placedaround the bead and the narrow ring on the top of the can. Both remedies consume a great deal of labor in theirv application, while the nails make leaks in the can and liquids escape, as well as deteriorating the contents.

The object of my invention is to overcome the above ditficultles in the use of. said cans by indenting the lower inner edges of the can top a suflicient amount to keep them from jarring out, and yet not to indent them so far that the lid or top cannot be pried off with a screw driver or other instrument. These indentations in the ed es of the top come. just below the reame down inner edges of the fiat ring fastened to the top of the can, so that the air and liquid-tight seal is not broken. The indentation does not break a hole in the tin, but simply presses it out slightly. As many indentations may bemade as desired, and they may be of any size desired.

Further objects and advantages of myinvention will be apparent from the following Figure 3 is a partial sectional view of the parts shown in Figure 2 with some other parts added.

Figure 4 is a side elevation of the casting of the lower part of the head.

Figures 5 and 6 are top and side elevations, respectively, of the spider.

Figure 7 is a partial sectional view of another form of my device shown in operation.

Figure 8 is a view of the lower part of the head member shown in Figure 7 with certain parts only in place.

Figure 9 is a partial sectional view of the partsshown in Figure 8 with some other parts added.

Figure 10 is a side elevation of the castlng of the lower part of-the head.

Similar numerals refer to similar parts throughout the several views, parts of my device in Figures 7 8, 9 and 10 similar to those in Figures 1 to 6 inclusive, having the letter a added.

In Figures 1 and 7, 1 is a friction top can with the top in place and with my invention in operation. To show the operation of the device, I have shown a stand to hold it, and the can, though the stand forms no part of my invention. The can rests on a base 3 fixed into which is a rod 2 holding lever mechanism generally denoted by 4. Rlngs 5 and 6 of said mechanism slide freely on 2. Band 10 is adjustably fixedon 2 by thumb screw 16. Link 12 is pivoted to 10 and to hand lever 8. Lever 8 is also pivoted to the central web of mechanism 4. Spring 9 tends to force the mechanism up. Integral This stand is shown only for convenience,

and it is apparent that, instead of a hand operated plunger, a power operated one could aswell be used.

In Figures 1 to 6, inclusive, head 17 has an upper part o'rplate 33 and a lower part 18. The top of the .lower part has a large hole, 25, drilled part way into it, leaving a shoulder 34. The lower part, or under side of 18, has a smaller hole in it, the upper part as large as the inner part of the shoulder permits. The lower hole is bellshaped, so that the outside part of punches 2O fit it exactly. Notches are then cut into the lower edges of the part 18 to permit the working ends of the punches to be projected. The part 18 has an outstanding shoulder 30 which rests on top of the. can. -Part 29 of the lower part 18 fits inside the can top and may reach nearly to the bottom of the top or .lid. The distance which shoulder 30 permits part 29 to project into the can top is to be determined by the structure of the cans and the needs of the particular industry. The amount the part 29- projects into the can top determines the distance from the top of the can top edges where. the indentations are made. Spider 19 fits into hole 25 and rests on slioulder 34. In the spider the punches 20 are swingingly held by pins 21. The working parts of the punches extend downward-and outward, so that they may be forced part way into the can top to dent it. The bell shaped hole in 18- limits the outward movement of the punches. The punches have smooth working ends, so that they -will indent, but not tear or puncture the tin. Part 18 has holes 24 drilled through its sides into which springs 23 and screws 22 fit. The springs tend to push the punches inward, away from the can top edges. Plate 33 is held to part 18, by screws 28 fitting in holes 31 in part 18. Plate 33 has a lower part which extends slightly into hole 25 to make a rigid connection. The'plate holds the spider 19 rigidly in place.

Plunger 7 has an enlarged head 26, which,

- when forced downward, forces the punches outward, and when withdrawn permits the springs 23 to retract the punches. Head 26 has a shoulder 32 which limits the upward movement of 26 in the head part 17. 27 is a ring fast to 7 which limits the downward movement of 7 in 17 This limiting means acts in conjunction with the limiting feature ofthe bell shaped hole in 18, and both make it im ossible to project the punches too far.

In igure 2 the lower part of the head is shown, with the plunger, the spider, the punches and their supporting pins in place. In Figure 3 the springs and screws 23 and 22 are added to the parts shown in Figure 2. In Figures 4, 5 and 6 the milled and drilled castings alone are shown.

In the modification shown in Figures 7 to 9, inclusive, no spider isused and the punches are bodily movable instead of being pivotally' mounted. The holes 24* are drilled in the lower part of the head horizontally and the punches are U-shaped'or forked. This shape holds the punches from falling out, downwardly, and it also gives a symmetrical and smooth working surface for the plunger 26 to work against. In this modification shoulder 32 cont-acts directly with top plate 33. The hole drilled in 18* goes all the way through parallel to the edges of the head, and it limits the outward movement of the punches.

In Figure 8 the lower part of the head isshown, with the plunger and the punches in place. In Figure 9 the springs and screws 23? and 22 are added to the parts shown in Figure 8. Figure 10 is the milled and drilled casting alone.

In operation the head is pushed down on the can top, 29 going into the top.. When shoulder 30 strikes the top outer edges of the can, the downward movement of the head stops, and the punches are rejected by the head 26 of the plunger working on the rear inclined edges of the punches. When lever 8 is raised, head 26 is withdnawn from contact with the punches, and they are, withdrawn by the springs 23 from contact with the can top. Shoulder 32 then contacts with head 17 and raises head 17 from the can. The number of punches in the head may be varied to suit the needs of the industry in which the cans are used.

. Many changes'in the apparatus may be made without departing from the spirit of my invention.

. I claim:

1. A locking device for friction top cans, a head member the lower face of which is adapted to. project into the top of a friction top can, means on the head member to limit its projection into and cause it to rest upon said top, a plurality of radially extending channels in said head member, and a plurality of punches movable in and being guided by said channels, the working faces of said punches projectin radially from the lowermost peripheral e. go of said head member, said punches being so mounted for movement that when they are forced out wardly, they bend the vertical edge of said can top outwardly and upwardly and means to operate said punches.

2. In a locking device for friction top cans, a head member, forked punches, tiered sets of radially extending guides in said head member, each set being between the prongs of each of said forked punches and each punch being movable translationally in each of said sets of guides, each punch having a working face projecting from said head member near its lowermost peripheral edge and means to operate said punches.

3. In a locking device for friction top cans, a head member, horizontally, radially extending channels in said head member, translationally movable punches in and guided by said channels, said channels and punches being so placed that the working faces of the punches project from the lowermost peripheral edge of said head member,

and means to operate said punches.

4. In a locking device for friction top cans, a head member, forked punches, tiered sets of horizontally, radially extending guides in said head member, each set being between the prongs of each of said forked punches and each punch being movable translationally in each of said sets of guides, each punch having a working face projecting from said head member near its lowermost peripheral edge and means to operate said punches.

5. In a locking device for friction top cans, a head member, forked punches, sets of radially extending guides in said head member, each set being between the prongs of each of said forked punches and each punch being movable translationally in each of said sets of guides, each punch having a Working face projecting from said head member at its lowermost peripheral edge and means to operate said punches.

6. In a locking device for friction top cans, a head member, forked punches, a plurality of sets of radially extending guides in said head member, each set being between the prongs of each of said forked punches and each punch being movable translationally in each of said sets of guides, each punch having a working surface projecting from said head member near its lowermost peripheral edge, means to expand said punches and means to retract the same.

7. In a locking device for friction top cans, a head member having an integral member, a plurality of upper and lower radially extending guides in said integral member, translationallv movable punches in and guided by said guides, each punch having a working face projecting from said head member near its lower peripheral edge, and means to operate said punches.

JOHN E. KEMLER. 

